Chelsea will meet Liverpool in the FA Cup Final. They beat Tottenham 5-1 in their London derby semi-final at Wembley.
But the game will be remembered for a controversial refereeing decision, when a goal was awarded despite the ball not crossing the line.
It's the incident that has the Internet ablaze with speculation and criticism of referees and their inability to make the correct decision in important matches.
For those that haven't seen the goal, watch it here:
Juan Mata was credited with the goal, even when the ball didn't appear to cross the line.